DIY Night Activated LDR Sensor Circuit Using LEDs & Light Dependent Resistors

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  • Опубликовано: 23 дек 2024

Комментарии • 34

  • @ShonKinsley
    @ShonKinsley 4 года назад +18

    He is such a genius as explains any electronics subject as simple as possible.

  • @kateriname2075
    @kateriname2075 11 месяцев назад

    Best explanation in electronics across not only the web...

  • @tlucente9670
    @tlucente9670 2 года назад

    Yes videos like this is how I learn best. Some people make clips where they will say use a lm317 a 1k ohm resistor but they never say why so I dont know how to figure the values for my own applications. This Is perfect thank you.

  • @akbarhasan4798
    @akbarhasan4798 3 года назад +4

    What about the voltage drop across R3 resistor?
    When you find the Va=2.6 value?

  • @PunmasterSTP
    @PunmasterSTP 3 года назад +2

    Thanks for LEDing us through your reasoning; another wonderful video!

  • @tamarabarnett9869
    @tamarabarnett9869 Год назад

    Man,you are such a great instructor!

  • @michaelgregson5165
    @michaelgregson5165 3 года назад +2

    Great educational video. Thankyou.

  • @Joe-Fowler
    @Joe-Fowler 4 года назад +3

    Could you go over the propities of group 2 elements?

  • @javariamalik8475
    @javariamalik8475 Год назад +1

    Is there any video where you have made the same circuit using op-amp LM 358 or else instead of transistor

  • @successthruknowledge
    @successthruknowledge 4 месяца назад

    Two very clever circuits. What are the light dependent resistors made from? Also, is a certain intensity of light required to trigger the light dependent resistor? I noticed in your second demonstration that either you were using some kind of night vision camera or that you had two lights of different intensities so that we could see the demonstration of course.

  • @VenkatesanS
    @VenkatesanS 3 года назад

    Clear Explanation Bro.

  • @MwesigwaJackson-n4x
    @MwesigwaJackson-n4x Год назад

    It is so educative, thanks for the good job done🎉🎉❤❤

  • @aaronlibas9085
    @aaronlibas9085 3 года назад +2

    what is the specific transistor to use?

  • @jpbernier3908
    @jpbernier3908 9 месяцев назад

    This was a great video, thanks! Could you possibly suggest a solution for my project? I have a photosensor that i am trying to defeat so that the circuit stays closed all the time, regardless of the lighting conditions. I can't think it would be as easy as simply removing the switch and joining the wires, could it? I think the entire system relies on a certain voltage to pass through the switch, but less than the 12v feeding it. If I were to measure the voltage with the switch closed, and replace the switch with a resistor that "mimicked" the output of the closed switch - would that do the job?

  • @switchback42
    @switchback42 2 года назад

    Thank you! This was very helpful!

  • @Festus2022
    @Festus2022 Год назад

    2 questions: 1. Why is the voltage at point A even needed for the LED, when you have 6V of Collector supply voltage above. It seems like if the voltage at point A was enough to establish a forward bias in the base, then the LED would light up due to the collector current. 2. When you calculated the required 2.6 V to activate the transistor and turn on the LED, why didn't you mention/include R3?

  • @brukhel
    @brukhel 2 года назад

    Everything is clear, but can NPN be any? I found some BC547B at home and tried to use it. Just to check, I connected 2 AA batteries: "plus" to C and B of transistor, E to "plus" of LED; GND of power source to the LED GND.
    It should be simplest test, but the LED just barely glows. At the same time it perfectly works directly from 2xAA.

  • @hoppingspr5149
    @hoppingspr5149 4 года назад +2

    Can you make a video on thin film interference

  • @qbitsday3438
    @qbitsday3438 2 года назад

    Great Video , i wou;ld like to add a back light to Victor VC97 , the thing is DMM is 3v. How to do?

  • @aimansam8428
    @aimansam8428 3 года назад +1

    hello sir, how can i increase the brighness of the led?

  • @zuusx5181
    @zuusx5181 3 года назад +1

    What about the collector recieving 6v ?

  • @Le_vis254
    @Le_vis254 Год назад

    I didn't understand your last part when you reversed ldr and R1. I think the circuit here should turn the LED OFF when the main light is ON and, LED turned ON when main light is OFF but your last part is the opposite according to the resistance values you have chosen.. I'm confused. Kindly clarify

  • @hpibmxjackson1702
    @hpibmxjackson1702 3 года назад

    great great explanation thank you

  • @miadikim
    @miadikim 10 месяцев назад

    very good video

  • @MadlyMusick
    @MadlyMusick 4 года назад +2

    How to make a zener diode

  • @puppydog7631
    @puppydog7631 3 года назад +2

    You can use an LED as a photo sensor as well. It is cheaper.

  • @newFaction64
    @newFaction64 2 года назад

    Why is the input 6v when your battery is 9v?

  • @emirhan1356
    @emirhan1356 4 года назад +2

    Hmm but is that mean we are always losing power? Whether light is on or off

  • @debiprasaddas6150
    @debiprasaddas6150 Год назад

    Here how to calculate current limiting resister.

  • @DEEPAKKUMARYADAV786
    @DEEPAKKUMARYADAV786 3 года назад +1

    Please correct your resistance symbol

  • @ardi_leo
    @ardi_leo 3 года назад

    What the transistor ?

  • @shravankawale7500
    @shravankawale7500 3 года назад +2

    All maked only night activayed ldr light" but u an all don't know how to make day/light activated ldr light"😂😂

  • @KianRasiwala
    @KianRasiwala 7 дней назад

    Bro

  • @KianRasiwala
    @KianRasiwala 7 дней назад

    To confusing for 5th graders bro